Lightricks LTX 2.3 Extend Video

Extend an existing video at the start or end, with optional prompt guidance for the new segment.

Model Overview

LTX 2.3 Extend Video appends or prepends new content around an existing clip while preserving temporal continuity. It is designed for short extension tasks where you need extra lead-in or tail footage.

Best At

• Extending a clip at either the beginning or the end.
• Maintaining style and motion continuity from source footage.
• Controlled continuation with lightweight prompt guidance.

Limitations / Not Good At

• Extension quality depends on source video coherence.
• Very long or highly complex continuation goals may require retries.
• Context settings can change how much prior motion is preserved.

Ideal Use Cases

• Add intro/outro seconds without manual editing.
• Continue short social clips for pacing adjustments.
• Prototype alternate endings from the same base footage.

Input & Output Format

• Input: required video_url; optional prompt, mode (start/end), duration, and context.
• Output: extended video URI returned on response.

Performance Notes

• mode controls whether the extension is attached at the start or end.
• context can be left at -1 for automatic behavior.
• Shorter extensions are usually faster and more stable for iteration.